Does your saddle always seem to slip to one side? Do you find yourself constantly correcting your position, feeling like you’re sitting crooked, no matter how hard you try? Or perhaps your horse feels wonderfully supple on one rein but mysteriously stiff and resistant on the other.

If any of this sounds familiar, you’re not alone. These common frustrations often point to a single, frequently overlooked cause: shoulder asymmetry. It’s one of the most prevalent challenges in saddle fitting, yet many riders don’t realize their horse has it or that their saddle is making it worse.

This isn’t about a ‘flawed’ horse; it’s about understanding natural biomechanics. Just as we are right- or left-handed, most horses have a dominant side. This natural laterality is the root of what we call the ‘high/low’ shoulder, and learning to manage it is a game-changer for comfort, performance, and harmony.

What is the ‘High/Low’ Shoulder? A Common Asymmetry Explained

First, let’s clear up a misconception. The ‘high/low’ shoulder is rarely a skeletal issue. Your horse’s bones aren’t uneven. Instead, it’s a difference in muscular development. Research into equine laterality shows this is a natural phenomenon. Studies suggest that a significant majority of horses exhibit some form of functional asymmetry, leading to one side of their body being more developed and coordinated than the other.

Here’s how it typically presents:

The ‘Low’ Shoulder: This is usually the horse’s stronger, more dominant side. The muscles here are larger and more developed, causing the shoulder to appear wider and fuller. Because it’s bulkier, it actually pushes the saddle up slightly, making the wither on this side appear lower.

The ‘High’ Shoulder: This is the weaker, less-developed side. The muscles are less prominent, creating a ‘hollow’ or dip behind the shoulder blade. With less muscle to support it, the saddle tends to fall into this space, making the wither on this side appear higher.

So, the ‘high/low’ terminology can be a bit confusing—it refers to the position of the withers, which is an effect, not the cause. The real issue is the difference in the muscle supporting the saddle.

The Biomechanics of the Problem: Why a ‘Normal’ Saddle Fails

Imagine trying to balance a perfectly level board on an uneven surface. It’s going to tilt, right? The same thing happens when you place a symmetrical saddle on an asymmetrical horse.

The saddle will naturally shift and slide toward the path of least resistance—the ‘high’ shoulder side, which has less muscle mass. This creates a cascade of problems:

1. Pressure Points: On the wider, more developed (‘low’) shoulder, the front of the saddle panel gets pinched, restricting movement. Meanwhile, on the hollow (‘high’) side, the back of the panel often digs in as the saddle tilts.

2. Rider Imbalance: As the saddle slips, it forces the rider off-center. You’ll find your weight collapsing onto the ‘high’ shoulder side, and you’ll constantly fight to bring your leg back and sit straight. This isn’t just uncomfortable; it reinforces the horse’s crookedness.

   Get in touch

3. Restricted Movement: A saddle that pinches the larger shoulder prevents the horse from extending freely. This can lead to a shorter stride, difficulty in turns, and a general reluctance to move forward.

4. Worsening Asymmetry: Constant, uneven pressure can hinder a horse’s proper back development. The overdeveloped muscles get overworked and tight, while the underdeveloped muscles never get the chance to engage and strengthen correctly.

Over time, what started as a small muscular imbalance becomes a significant performance and comfort issue for both partners.

Identifying Shoulder Asymmetry in Your Own Horse

You don’t need to be an expert to spot the signs. Here are a few simple checks you can do in the stable:

Step 1: The View From Above

Safely stand on a sturdy mounting block and look down directly over your horse’s withers while they are standing square on level ground. Do the muscles on either side look like mirror images, or does one side appear fuller and the other flatter?

Step 2: The Hands-On Feel

Place your palms flat on either side of your horse, just behind the shoulder blades. Apply gentle, even pressure.

Can you feel a noticeable difference in the muscle bulk?
Does one hand sink in more than the other?
Try to trace the edge of each shoulder blade. Does one feel like it sits further back than the other?

Step 3: Observe Under Saddle

Pay attention to the signs when you ride. Does your saddle pad have uneven sweat marks? Do you consistently have to pull your saddle back to the center? These are tell-tale clues.

Saddle Fitting Solutions: Creating Balance on an Unbalanced Back

The goal of saddle fitting for an asymmetrical horse is twofold:

1. Provide space and freedom for the larger, overdeveloped shoulder.
2. Fill the ‘void’ and offer stable support for the weaker, underdeveloped shoulder.

This isn’t about forcing a symmetrical saddle onto the horse. It’s about using intelligent adjustments to create a level, balanced surface for the saddle to rest on.

Solution 1: Specialized Panel Adjustments

For saddles with wool-flocked panels, a skilled fitter can make a critical adjustment. They can add more wool to the panel on the underdeveloped (‘high’ wither) side. This strategically placed flocking lifts that side of the saddle, preventing it from collapsing into the hollow and effectively creating a ‘riser’ within the saddle itself.

This method requires precision. At Iberosattel, our philosophy is built around such adaptability. Features like our Comfort Panel are designed with a wider contact surface and specialized flocking materials that allow for these exact, nuanced adjustments, ensuring pressure is distributed evenly while supporting symmetrical development. A balanced saddle doesn’t just help the horse; it’s also a cornerstone of proper saddle fit for the rider, preventing them from constantly fighting to stay centered.

Solution 2: The Art of Shimming

Another excellent tool is a corrective saddle pad with shims. Think of a shim like a coaster you place under a wobbly table leg—it levels the surface. The key is targeted shimming.

You should only place a shim on the side that needs support—the hollow, underdeveloped side. By inserting a shim in the front pocket of the pad on that side, you fill the muscular ‘dip’ and create a level base for the saddle. This stops the saddle from slipping and balances the rider’s weight correctly.

Common Mistake: Never ‘shim both sides.’ Shimming the already larger shoulder will only worsen the pinching and restriction. The goal is to balance, not just add padding. Incorrect shimming can create new pressure points and become one of the hidden causes of back pain in horses.

A Holistic Approach: Saddle Fitting is Only Part of the Puzzle

It’s crucial to remember that a well-fitted saddle is a supportive tool, not a permanent crutch. The ultimate goal is to help your horse develop more symmetrical musculature through correct training.

Work with your trainer on exercises that encourage the horse to use its weaker side more effectively. Exercises like groundwork, shoulder-in, serpentines, and transitions on a circle can all help build strength and straightness.

As your horse’s muscles change, your saddle will need to be adjusted accordingly. The shims you use today might need to be thinner in six months, or the flocking may need to be altered. This dynamic approach ensures the saddle continues to support the horse’s current stage of development.

Frequently Asked Questions (FAQ)

Is a ‘high/low’ shoulder permanent?

In most cases, no. Because it’s typically muscular rather than skeletal, this asymmetry can be significantly improved—and sometimes even resolved—with a combination of correct training, bodywork, and a properly adjusted saddle that allows the weaker muscles to develop.

Can I just use a thicker pad to fix the problem?

Unfortunately, this usually makes things worse. A thick, non-corrective pad will compress more over the hollow side but will add even more bulk to the larger shoulder, increasing the pressure and restriction there. Targeted support (like a shim) is far more effective.

Will my young horse grow out of it?

Not automatically. Laterality is ingrained, and without correct work and supportive equipment, a young horse will continue reinforcing its natural crookedness. Addressing it early is the best way to encourage balanced, symmetrical development for a long and healthy riding career.

How often should I have my saddle checked for an asymmetrical horse?

More frequently than for a symmetrical horse, especially if you’re in a corrective training program. We recommend a check every 4-6 months, as the changes in your horse’s musculature can be subtle but significant, requiring adjustments to the flocking or shims.

The Path to Harmony: Your Next Steps

Understanding your horse’s shoulder asymmetry isn’t about finding a flaw; it’s about gaining a deeper insight into their body and movement. By recognizing and addressing it, you remove a major source of discomfort and resistance, opening the door to a more willing, balanced, and harmonious partnership.

Take a few minutes this week to perform the simple checks on your horse. Look and feel for the differences. If you suspect your horse has a significant asymmetry, the best next step is to seek a professional evaluation. Contact a qualified saddle expert to provide a hands-on assessment and discuss the best solutions for you and your horse.